Omeisaurus Facts
Pronunciation: oh-MY-sore-us
Name meaning: Emei Mountain Lizard
| Diet | Herbivore |
| Height | 4m |
| Length | 15m |
| Weight | 10 tonnes |
| Environment | Land |
| Era | Jurassic |
| Period | Middle Jurassic |
| Type | Sauropod |
| Location | China |
Omeisaurus was a remarkable sauropod dinosaur that roamed the lush forests and plains of what is now China during the Middle to Late Jurassic Period, approximately 175 to 149 million years ago. Named after Mount Emei in Sichuan Province where it was first discovered, this impressive herbivore represents one of the earlier members of the long-necked sauropod family.
Measuring around 15 metres in length and standing about 4 metres tall at the hip, Omeisaurus was a substantial creature weighing approximately 10 tonnes. Like other sauropods, it possessed the characteristic long neck, small head, massive body, and lengthy tail. However, Omeisaurus was notably smaller than some of its later relatives, making it a more modestly-sized member of this giant group of dinosaurs.
As a herbivore, Omeisaurus spent its days browsing on ferns, conifers, and other prehistoric plants that grew in the warm, humid climate of Jurassic China. Its long neck allowed it to reach vegetation at various heights, from ground-level plants to the tops of tall trees. The dinosaur's small head housed simple, peg-like teeth perfectly adapted for stripping leaves rather than chewing, so it likely swallowed stones to help grind plant material in its stomach.
Omeisaurus lived alongside other fascinating dinosaurs of the Jurassic, including the fearsome predator Yangchuanosaurus and the plated dinosaur Tuojiangosaurus, creating a diverse ecosystem in ancient China.
What made Omeisaurus distinctive?
Omeisaurus had a relatively shorter neck compared to its later relatives like Mamenchisaurus, with around 17 neck vertebrae. It possessed a robust build with sturdy legs and a particularly long tail that made up much of its body length.
Behaviour
Omeisaurus likely lived in herds for protection against predators, moving slowly through forests whilst feeding continuously throughout the day. Being such large animals, they probably had established migration routes following seasonal food sources and may have used their long tails as defensive weapons when threatened.
Discovery
Omeisaurus was first described by Yang Zhongjian in 1939. The original fossils were discovered at Shaximiao Formation, Sichuan Province, China.
Omeisaurus FAQ
What did Omeisaurus eat?
Omeisaurus was a herbivore that fed on various prehistoric plants including ferns, conifers, cycads, and ginkgoes. It used its long neck to browse at different heights and swallowed stones to help digest tough plant material in its stomach.
How big was Omeisaurus?
Omeisaurus reached about 15 metres in length and stood roughly 4 metres tall at the hip. It weighed approximately 10 tonnes, making it a medium-sized sauropod compared to some of the later giants like
Brontosaurus.
When did Omeisaurus live?
Omeisaurus lived during the Middle to
Late Jurassic Period, approximately 175 to 149 million years ago. This was a time when the climate was warm and humid, perfect for the lush vegetation these dinosaurs needed.
Where was Omeisaurus found?
Omeisaurus fossils have been discovered in China, specifically in the Shaximiao Formation of Sichuan Province. The dinosaur is named after Mount Emei in the same region where the first specimens were found.
How do you pronounce Omeisaurus?
Omeisaurus is pronounced 'oh-MY-sore-us'. The name comes from Mount Emei (oh-MY) where it was discovered, combined with 'saurus' meaning lizard.
What does Omeisaurus mean?
Omeisaurus means 'Emei Mountain Lizard', named after Mount Emei in Sichuan Province, China, where the first fossils were discovered in the 1930s.
How fast could Omeisaurus run?
Like most sauropods, Omeisaurus was not built for speed. These massive dinosaurs likely moved at a slow walking pace of around 4-6 km/h, similar to modern elephants, due to their enormous size and weight.
What type of dinosaur was Omeisaurus?
Omeisaurus was a sauropod dinosaur, belonging to the family Mamenchisauridae. These were long-necked, plant-eating dinosaurs that walked on four legs and were among the largest land animals ever to exist.
Was Omeisaurus related to birds?
Omeisaurus was not closely related to birds. As a sauropod, it belonged to a different branch of the dinosaur family tree. Birds evolved from theropod dinosaurs, whilst Omeisaurus was a member of the sauropod group.
How many Omeisaurus fossils have been found?
Multiple Omeisaurus specimens have been discovered since the first find in 1939, including several nearly complete skeletons. These discoveries have allowed scientists to identify different species and understand the anatomy of these early sauropods quite well.
